公开(公告)号：US20170294945A1

公开(公告)日：2017-10-12

申请号：US15630303

申请日：2017-06-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Kunpeng LIU ,  Jianghua LIU ,  Leiming ZHANG

IPC: H04B7/0417 ,  H04B7/0456 ,  H04L5/00 ,  H04W24/08

Abstract: Embodiments of the present invention provide a channel measurement and feedback method, a network device, and a system, and relate to the field of communications technologies. The method includes: receiving, by a first network device, pilot port configuration information sent by a second network device, where the pilot port configuration information is used to describe at least two pilot ports; measuring, by using the at least two pilot ports, a pilot signal sent by the second network device, and determining first information, where the first information includes at least one of second information of the first network device or third information of a third network device when it is assumed that the first network device and the third network device communicate with the second network device by performing spatial multiplexing on a same time frequency resource.

公开(公告)号：US20170099093A1

公开(公告)日：2017-04-06

申请号：US15365653

申请日：2016-11-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Leiming ZHANG ,  Yongxing ZHOU ,  Jianghua LIU ,  Kunpeng LIU

IPC: H04B7/06 ,  H04B7/04

CPC classification number: H04B7/0626 ,  H04B7/0456 ,  H04B7/0634 ,  H04B7/0639

Abstract: The present invention discloses a channel state information CSI reporting method and apparatus, and a base station antenna. In the method, at least one precoding matrix is selected from a codebook based on a reference signal sent by a base station, and CSI is sent to the base station. The CSI includes at least one selected precoding matrix indicator PMI, and the PMI is corresponding to the selected at least one precoding matrix. At least one precoding matrix W included in the codebook may be expressed as W=W1W2 where is a Kronecker product, and at least one of W1 or W2 is an antenna selection matrix. Therefore, in embodiments of the present invention, the base station can select, according to the at least one precoding matrix that is fed back, one or more antenna ports to send a signal.

公开(公告)号：US20170099090A1

公开(公告)日：2017-04-06

申请号：US15382206

申请日：2016-12-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kunpeng LIU ,  Leiming ZHANG ,  Jianghua LIU

IPC: H04B7/04 ,  H04B7/06

CPC classification number: H04B7/0473 ,  H04B7/04 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0632 ,  H04L1/0026 ,  H04L1/06

Abstract: Embodiments of the present invention disclose a signal transmission method, a system, and a device. When measuring a reference signal and determining channel quality, UE obtains a difference between codeword to CSI-RS mapping relationships by using a channel quality measurement model, may calculate an optimized mapping relationship by means of measurement, and determines at least one mapping relationship from these mapping relationships, to adjust a codeword to CSI-RS mapping relationship of a channel, thereby improving system flexibility and increasing channel resource utilization.

公开(公告)号：US20160218780A1

公开(公告)日：2016-07-28

申请号：US15090446

申请日：2016-04-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Leiming ZHANG ,  Qiang WU ,  Jianghua LIU

IPC: H04B7/04 ,  H04B1/04

CPC classification number: H04B7/0417 ,  H04B1/0475 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0639 ,  H04L25/03006

Abstract: The present invention provides a precoding matrix indicator feedback method, a receive end, and a transmit end. The method includes: selecting, by a receive end based on a reference signal, a precoding matrix W from a codebook, where a coefficient α is used to perform phase adjustment on φn in W, φn represents a phase difference between weighted values of a first antenna group and a second antenna group of a transmit end for a transmission signal from a same transmission layer, ϕ n ∈ {  j2π   n Q } , and the first antenna group and the second antenna group belong to a same multi-antenna system; and sending, by the receive end, a precoding matrix indicator (PMI) to the transmit end. In this way, using the coefficient α to perform the phase adjustment on φn can increase a size of a codebook set applicable to different antenna configurations, and improve precision of the receive end to feed back a PMI.

Abstract translation: 本发明提供预编码矩阵指示符反馈方法，接收端和发送端。 该方法包括：基于参考信号的接收端选择来自码本的预编码矩阵W，其中使用系数α对W中的φn执行相位调整，φn表示第一个的加权值之间的相位差 天线组和来自同一传输层的传输信号的发射端的第二天线组，并且第一天线组和第二天线组属于相同的多天线 系统; 并且由接收端将发送端的预编码矩阵指示符（PMI）发送给发送端。 以这种方式，使用系数α对φn执行相位调整可以增加适用于不同天线配置的码本集的大小，并且提高接收端的反馈PMI的精度。